package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.annotation.AutoFill;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.enumeration.OperationType;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealDishService;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import org.apache.ibatis.annotations.Mapper;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service

public class SetmealServiceImpl implements SetmealService
{

    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private DishMapper dishMapper;

    /**
     * 新增套餐和对应菜品
     * @param setmealDTO
     */
    @Transactional
    @Override
    public void saveWithDish(SetmealDTO setmealDTO)
    {
        //新增套餐
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        setmeal.setStatus(StatusConstant.DISABLE);//新增套餐默认为停售状态

        setmealMapper.insert(setmeal);

        //获取出入套餐的ID值
        Long setmealId = setmeal.getId();

        //根据套餐ID新增对应菜品
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealId);
        });

        setmealDishMapper.insertBatch(setmealDishes);

    }


    /**
     * 套餐分页查询
     * @param setmealPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO)
    {
        PageHelper.startPage(setmealPageQueryDTO.getPage(),setmealPageQueryDTO.getPageSize());

        Page<SetmealVO > page = setmealMapper.pageQuery(setmealPageQueryDTO);

        return new PageResult(page.getTotal(), page.getResult());
    }


    /**
     * 根据ID删除套餐
     * @param ids
     */
    @Override
    @Transactional
    public void deleteBatch(List<Long> ids)
    {
        //起售中的套餐不能删除
        for (Long id : ids) {
            Setmeal setmeal = setmealMapper.getById(id);
            if(setmeal.getStatus() == StatusConstant.ENABLE)
            {
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        }

        ids.forEach(setmealId->{
            //删除套餐表中的数据
            setmealMapper.deleteById(setmealId);
            //删除套餐菜品关系表中的数据
            setmealDishMapper.deleteBySetmealId(setmealId);
        });


    }

    /**
     * 根据ID查询套餐,用于修改界面的回显
     * @param id
     * @return
     */
    @Override
    public SetmealVO getByIdWithDish(Long id)
    {
        //查询套餐
        Setmeal setmeal = setmealMapper.getById(id);
        //查询套餐对应的setmealDIsh
        List<SetmealDish> setmealDishes = setmealDishMapper.getSetmealIdsByDishId(id);

        SetmealVO setmealVO = new SetmealVO();
        BeanUtils.copyProperties(setmeal,setmealVO);
        setmealVO.setSetmealDishes(setmealDishes);

        return setmealVO;
    }


    /**
     * 修改套餐
     * @param setmealDTO
     */
    @Override
    public void update(SetmealDTO setmealDTO)
    {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);

        setmealMapper.update(setmeal);
        //套餐ID
        Long setmealId = setmealDTO.getId();

        //先删除套餐和菜品的关联关系
        setmealDishMapper.deleteBySetmealId(setmealId);

        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealId);
        });

        //重新插入套餐和菜品的关联关系
        setmealDishMapper.insertBatch(setmealDishes);
    }


    /**
     * 套餐启用禁用
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id)
    {
        //起售套餐时，判断套餐内是否有停售菜品，有停售提示：“套餐内包含停售菜品，无法起售”
        if(status == StatusConstant.ENABLE)
        {

            List<Dish> dishList = dishMapper.getBySetmealId(id);
            if(dishList != null && dishList.size() > 0)
            {
                dishList.forEach(dish -> {
                    if(dish.getStatus() == StatusConstant.DISABLE)
                    {
                        throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                    }
                });
            }

        }

        Setmeal setmeal = Setmeal.builder()
                .id(id)
                .status(status)
                .build();
        setmealMapper.update(setmeal);
    }


    /**

     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }



    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }

}
